40018402 has 8 divisors (see below), whose sum is σ = 61045200. Its totient is φ = 19670004.

The previous prime is 40018393. The next prime is 40018403. The reversal of 40018402 is 20481004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40018402.

It is not an unprimeable number, because it can be changed into a prime (40018403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169452 + ... + 169687.

It is an arithmetic number, because the mean of its divisors is an integer number (7630650).

Almost surely, 2^40018402 is an apocalyptic number.

40018402 is a deficient number, since it is larger than the sum of its proper divisors (21026798).

40018402 is a wasteful number, since it uses less digits than its factorization.

40018402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339200.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 40018402 is about 6326.0099588919. The cubic root of 40018402 is about 342.0476262572.

Adding to 40018402 its reverse (20481004), we get a palindrome (60499406).

It can be divided in two parts, 4001 and 8402, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 40018402 in words is "forty million, eighteen thousand, four hundred two".